-21=3v-1-8

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Solution for -21=3v-1-8 equation: 



-21=3v-1-8

We move all terms to the left:

-21-(3v-1-8)=0

We add all the numbers together, and all the variables

-(3v-9)-21=0

We get rid of parentheses

-3v+9-21=0

We add all the numbers together, and all the variables

-3v-12=0

We move all terms containing v to the left, all other terms to the right

-3v=12

v=12/-3

v=-4

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